Sökning: "band offset"

Visar resultat 1 - 5 av 41 avhandlingar innehållade orden band offset.

1. 1. The band offset and the critical layer thickness in III-V compound semiconductor heterostructures

   Författare :Shu Min Wang; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; interface morphology; molecular beam epitaxy; band offset; transmission electron microscopy; InGaAs; strain; photoluminescence; critical layer thickness; quantum wells; heterostructures; III-V compounds;

   Sammanfattning : .... LÄS MER

3. 2. Modern numerical methods in electromagnetics applied to the design of reflector antennas and horn feeds

   Författare :Martin Johansson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; reflector antenna; cluster feed; offset; dual-reflector feed; mode matching; very long baseline interferometry; circular waveguide; diffraction; physical optics; corrugated horn; coaxial waveguide; VLBI; dual-frequency; low noise; finite element method; ray tracing; dual-band;

   Sammanfattning : .... LÄS MER

4. 3. Ultrathin gate oxides for future SiGe CMOS devices

   Författare :Alok Sareen; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gate oxide; ultrathin; C-V; SiGe; valence band offset;

   Sammanfattning : .... LÄS MER

5. 4. ALD Buffer Layer Growth and Interface Formation on Cu(In,Ga)Se2 Solar Cell Absorbers

   Författare :Jan Sterner; Lars Stolt; Roland Scheer; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; thin film; Cu In; Ga Se2; CIGS; chalcopyrite; ALD; sulfurization; buffer layer; XPS; UPS; electron spectroscopy; band alignment; atomic layer deposition; Elektronik; Electronics; Elektronik;

   Sammanfattning : Cu(In,Ga)Se2 (CIGS) thin film solar cells contain a thin layer of CdS. To avoid toxic heavy-metal-containing waste in the module production the development of a cadmium-free buffer layer is desirable. This thesis considers alternative Cd-free buffer materials deposited by Atomic Layer Deposition (ALD). LÄS MER

7. 5. MMIC-based Low Phase Noise Millimetre-wave Signal Source Design

   Författare :Thi Ngoc Do Thanh; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; millimetre-wave; MMIC; low frequency noise; phase noise; GaN HEMT; signal source; D-band; InP DHBT; deposition method.; SiGe BiCMOS; frequency multiplier; VCO; passivation;

   Sammanfattning : Wireless technology for future communication systems has been continuously evolving to meet society’s increasing demand on network capacity. The millimetre-wave frequency band has a large amount of bandwidth available, which is a key factor in enabling the capability of carrying higher data rates. LÄS MER